<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .slideshow {
            width: 520px;
            height: 280px;
            background-image: url(img/tb.jpg);
            position: relative;
            margin: auto;
        }

        .left {
            position: absolute;
            top: 50%;
            left: 0;
            margin-top: -18px;
        }

        .right {
            position: absolute;
            top: 50%;
            right: 0;
            margin-top: -18px;
        }

        .left:hover,
        .right:hover {
            cursor: pointer;
        }

        ul {
            background-color: rgba(152, 132, 132, 0.5);
            position: absolute;
            left: 50%;
            bottom: 20px;
            margin-left: -50px;
            border-radius: 15px;
            padding: 0 5px;
            height: 14px;
            line-height: 10px;
        }

        ul li {
            list-style: none;
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: aliceblue;
        }

        ul li:hover {
            cursor: pointer;
            background-color: orange;
        }
    </style>

</head>

<body>
    <div class="slideshow">
        <img class="left" src="img/left.png" alt="">
        <img class="right" src="img/right.png" alt="">
        <ul>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</body>

</html>